kc3-lang/angle/src/compiler/translator/TranslatorMetalDirect/ProgramPrelude.h

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• Author : Kyle Piddington
  Date : 2021-04-26 16:56:15
  Hash : d7aa0130
  Message : Upstream Apple's direct-to-Metal backend: compile translator. This change is meant to merge the translator changes from Apple's direct-to-Metal backend. Taken from Kyle Piddington's CL: https://chromium-review.googlesource.com/c/angle/angle/+/2857366/ The goal of this CL is to merge the translator code in a state that compiles, but not to switch the Metal backend over to use this translator backend yet. Bug: angleproject:5505 Change-Id: I68a6354604498cd5fd1eb96c13fc56f3b38f2bd0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2897536 Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>

• src/compiler/translator/TranslatorMetalDirect/ProgramPrelude.h

• //
  // Copyright 2020 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef COMPILER_TRANSLATOR_TRANSLATORMETALDIRECT_PROGRAMPRELUDE_H_
  #define COMPILER_TRANSLATOR_TRANSLATORMETALDIRECT_PROGRAMPRELUDE_H_
  
  #include <unordered_set>
  
  #include "common/angleutils.h"
  
  namespace sh
  {
  
  class TInfoSinkBase;
  class TIntermBlock;
  
  enum class MetalShaderType
  {
      None,
      Vertex,
      Fragment,
      Compute,  // Unused currently
      Count,
  };
  
  struct ProgramPreludeConfig
  {
    public:
      ProgramPreludeConfig() {}
      explicit ProgramPreludeConfig(MetalShaderType shaderType) : shaderType(shaderType) {}
      bool hasStructEq           = false;
      MetalShaderType shaderType = MetalShaderType::None;
  };
  
  // This emits fixed helper Metal code directly without adding code to the AST. This walks the AST to
  // figure out the required what prelude MSL code is needed for various things in the AST. You can
  // think of this as effectively inlining various portions of a helper library into the emitted
  // Metal program.
  ANGLE_NO_DISCARD bool EmitProgramPrelude(TIntermBlock &root,
                                           TInfoSinkBase &out,
                                           const ProgramPreludeConfig &ppc);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TRANSLATORMETALDIRECT_PROGRAMPRELUDE_H_